GENERAL DESCRIPTION
The AD9954 is a direct digital synthesizer (DDS) that uses advanced technology, coupled with an internal high speed, high performance DAC to form a complete, digitally programmable, high frequency synthesizer capable of generating a frequencyagile analog output sinusoidal waveform at up to 160 MHz. The AD9954 enables fast frequency hopping coupled with fine tuning of both frequency (0.01 Hz or better) and phase (0.022° granularity).

FEATURES
   400 MSPS internal clock speed
   Integrated 14-bit DAC
   Programmable phase/amplitude dithering
   32-bit frequency tuning accuracy
   14-bit phase tuning accuracy
   Phase noise better than –120 dBc/Hz
   Excellent dynamic performance
      >80 dB narrowband SFDR
   Serial I/O control
   Ultrahigh speed analog comparator
   Automatic linear and nonlinear frequency sweeping
   4 frequency/phase offset profiles
   1.8 V power supply
   Software and hardware controlled power-down
   48-lead TQFP
   Integrated 1024 word × 32-bit RAM
   Support for 5 V input levels on most digital inputs
   PLL-based REFCLK multiplier
   Internal oscillator, can be driven by a single crystal
   Phase modulation capability
   Multichip synchronization

APPLICATIONS
   Agile LO frequency synthesis
   Programmable clock generators
   FM chirp source for radar and scanning systems
   Automotive radars
   Test and measurement equipment
   Acousto-optic device drivers